<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>GeoUtils示例</title>
<script type="text/javascript" src="http://api.map.baidu.com/api?v=1.2"></script>
<script type="text/javascript" src="../../src/GeoUtils/GeoUtils.min.js"></script>
<style type="text/css">
    table{
        font-size:14px;
    }
</style>
</head>
<body>
<div style="float:left;width:600px;height:500px;border:1px solid gray" id="container"></div>
<div style="float:left;width:300px;height:500px;border:1px solid gray" id="control">
    <table style="width:100%;" >
        <tr>
            <td colspan="2">点与矩形的关系: </td>
        </tr>
        <tr>            
            <td><input type="button" value="点在矩形内" onclick="ptInRect()" /></td>
            <td><input type="button" value="点在矩形外" onclick="ptOutRect()" /></td>
        </tr>
        <tr>
            <td><br/></td>
        </tr>
        <tr>
            <td colspan="2">点与圆形的关系: </td>
        </tr>
        <tr>            
            <td><input type="button" value="点在圆形内" onclick="ptInCircle()" /></td>
            <td><input type="button" value="点在圆形外" onclick="ptOutCircle()" /></td>
        </tr>
        <tr>
            <td><br/></td>
        </tr>
        <tr>
            <td colspan="2">计算折线长度: </td>
        </tr>
        <tr>            
            <td><input type="button" value="参数为折线" onclick="computeLenByPolyine()" /></td>
            <td><input type="button" value="参数为点数组" onclick="computeLenByArray()" /></td>
        </tr>
        <tr>
            <td><br/></td>
        </tr>
        <tr>
            <td colspan="2">计算多边形面积: </td>
        </tr>
        <tr>            
            <td><input type="button" value="参数为多边形" onclick="computeAreaByPolygon()" /></td>
            <td><input type="button" value="参数为点数组" onclick="computeAreaByArray()" /></td>
        </tr>
        <tr>
            <td><br/></td>
        </tr>
        <tr>
            <td colspan="2">判断点是否在折线上: </td>
        </tr>
        <tr>            
            <td><input type="button" value="点在折线上" onclick="ptOnPolyline()" /></td>
            <td><input type="button" value="点在折线外" onclick="ptOutPolyline()" /></td>
        </tr>
        <tr>
            <td><br/></td>
        </tr>
        <tr>
            <td colspan="2">判断点是否在多边形内: </td>
        </tr>
        <tr>            
            <td><input type="button" value="点在多边形内" onclick="ptInPolygon()" /></td>
            <td><input type="button" value="点在多边形外" onclick="ptOutPolygon()" /></td>
        </tr>
    <table>
</div>
</body>
</html>
<script type="text/javascript">

var map = new BMap.Map("container");
var pt = new BMap.Point(116.404, 39.915);
map.centerAndZoom(pt, 16);

map.enableScrollWheelZoom();//开启滚动缩放
map.enableContinuousZoom();//开启缩放平滑

//点在矩形内
function ptInRect(){    
    var pt = new BMap.Point(116.404, 39.915);//测试点

    var pt1 = new BMap.Point(116.400, 39.910);//西南脚点
    var pt2 = new BMap.Point(116.410, 39.920);//东北脚点
    var bds = new BMap.Bounds(pt1, pt2); //测试Bounds对象
        
    var result = BMapLib.GeoUtils.isPointInRect(pt, bds);
    if(result == true){
        alert("点在矩形内");
    } else {
        alert("点在矩形外")
    }

    //演示：将点与矩形添加到地图上
    map.clearOverlays();    
    var mkr = new BMap.Marker(pt);
    var pts = [];
    //bds的四个脚点坐标
    var leftTop = new BMap.Point(pt1.lng, pt2.lat);
    var rightTop = new BMap.Point(pt2.lng, pt2.lat);
    var leftBottom = new BMap.Point(pt1.lng, pt1.lat);
    var rightBottom = new BMap.Point(pt2.lng, pt1.lat);
    pts.push(leftTop);
    pts.push(rightTop);
    pts.push(rightBottom);
    pts.push(leftBottom);
    var rect = new BMap.Polygon(pts);
    map.addOverlay(mkr);//添加测试点
    map.addOverlay(rect);//添加测试矩形    
    
}

//点在矩形外
function ptOutRect(){
    var pt = new BMap.Point(116.398, 39.915);//测试点

    var pt1 = new BMap.Point(116.400, 39.910);//西南脚点
    var pt2 = new BMap.Point(116.410, 39.920);//东北脚点
    var bds = new BMap.Bounds(pt1, pt2); //测试Bounds对象
        
    var result = BMapLib.GeoUtils.isPointInRect(pt, bds);
    if(result == true){
        alert("点在矩形内");
    } else {
        alert("点在矩形外")
    }

    //演示：将点与矩形添加到地图上
    map.clearOverlays();    
    var mkr = new BMap.Marker(pt);
    var pts = [];
    //bds的四个脚点坐标
    var leftTop = new BMap.Point(pt1.lng, pt2.lat);
    var rightTop = new BMap.Point(pt2.lng, pt2.lat);
    var leftBottom = new BMap.Point(pt1.lng, pt1.lat);
    var rightBottom = new BMap.Point(pt2.lng, pt1.lat);
    pts.push(leftTop);
    pts.push(rightTop);
    pts.push(rightBottom);
    pts.push(leftBottom);
    var rect = new BMap.Polygon(pts);
    map.addOverlay(mkr);//添加测试点
    map.addOverlay(rect);//添加测试矩形     
}

//点在圆内
function ptInCircle(){
    var pt = new BMap.Point(116.404, 39.915);//测试点
    var c = new BMap.Point(116.404, 39.915); //圆心 
    var circle = new BMap.Circle(c, 500);//测试圆
        
    var result = BMapLib.GeoUtils.isPointInCircle(pt, circle);
    if(result == true){
        alert("点在圆形内");
    } else {
        alert("点在圆形外")
    }

    //演示：将点与圆形添加到地图上
    map.clearOverlays();
    var mkr = new BMap.Marker(pt);
    map.addOverlay(mkr);
    map.addOverlay(circle);
}

//点在圆外
function ptOutCircle(){
    var pt = new BMap.Point(116.396, 39.915);//测试点
    var c = new BMap.Point(116.404, 39.915); //圆心 
    var circle = new BMap.Circle(c, 500);//测试圆        
    
    var result = BMapLib.GeoUtils.isPointInCircle(pt, circle);
    if(result == true){
        alert("点在圆形内");
    } else {
        alert("点在圆形外")
    }

    //演示：将点与圆形添加到地图上
    map.clearOverlays();
    var mkr = new BMap.Marker(pt);
    map.addOverlay(mkr);
    map.addOverlay(circle);
}

//计算长度，参数为折线
function computeLenByPolyine(){    
    var pts = [];
    var pt1 = new BMap.Point(116.400,39.910);
    var pt2 = new BMap.Point(116.402,39.912);
    var pt3 = new BMap.Point(116.403,39.914);
    var pt4 = new BMap.Point(116.404,39.917);
    var pt5 = new BMap.Point(116.406,39.918);
    
    pts.push(pt1);
    pts.push(pt2);
    pts.push(pt3);
    pts.push(pt4);
    pts.push(pt5);

    var ply = new BMap.Polyline(pts);    
    var dis = BMapLib.GeoUtils.getPolylineDistance(ply);
    alert("共" + dis.toFixed(2) + "米");
    
    //演示：将线添加到地图上
    map.clearOverlays();
    map.addOverlay(ply);
}

//计算长度，参数为点数组
function computeLenByArray(){
    var pts = [];
    var pt1 = new BMap.Point(116.400,39.910);
    var pt2 = new BMap.Point(116.402,39.912);
    var pt3 = new BMap.Point(116.403,39.914);
    var pt4 = new BMap.Point(116.404,39.917);
    var pt5 = new BMap.Point(116.406,39.918);
    
    pts.push(pt1);
    pts.push(pt2);
    pts.push(pt3);
    pts.push(pt4);
    pts.push(pt5);
        
    var dis = BMapLib.GeoUtils.getPolylineDistance(pts);
    alert("共" + dis.toFixed(2) + "米");
    
    //演示：将线添加到地图上
    var ply = new BMap.Polyline(pts, {strokeColor: "red", strokeStyle:"dashed"});
    map.clearOverlays();
    map.addOverlay(ply);        
}

//计算面积，参数为多边形
function computeAreaByPolygon(){
    var pts = [];
    var pt1 = new BMap.Point(116.395, 39.910);
    var pt2 = new BMap.Point(116.394, 39.918);
    var pt3 = new BMap.Point(116.396, 39.919);
    var pt4 = new BMap.Point(116.404, 39.920);
    var pt5 = new BMap.Point(116.406, 39.913);    
    
    pts.push(pt1);
    pts.push(pt2);
    pts.push(pt3);
    pts.push(pt4);
    pts.push(pt5);    

    var ply = new BMap.Polygon(pts);    
    var area = BMapLib.GeoUtils.getPolygonArea(ply);
    alert("共" + area.toFixed(2) + "平方米"); 
    
    //演示：将面添加到地图上    
    map.clearOverlays();
    map.addOverlay(ply);  
}

//计算面积，参数为数组
function computeAreaByArray(){
    var pts = [];
    var pt1 = new BMap.Point(116.395, 39.910);
    var pt2 = new BMap.Point(116.394, 39.918);
    var pt3 = new BMap.Point(116.396, 39.919);
    var pt4 = new BMap.Point(116.404, 39.920);
    var pt5 = new BMap.Point(116.406, 39.913);    
    
    pts.push(pt1);
    pts.push(pt2);
    pts.push(pt3);
    pts.push(pt4);
    pts.push(pt5);
        
    var area = BMapLib.GeoUtils.getPolygonArea(pts);
    alert("共" + area.toFixed(2) + "平方米"); 
    
    //演示：将面添加到地图上
    var ply = new BMap.Polygon(pts, {strokeColor: "red", strokeStyle:"dashed", fillColor:"gray"});    
    map.clearOverlays();
    map.addOverlay(ply);          
}

//点在折线上
function ptOnPolyline(){
    var pts = [];
    var pt1 = new BMap.Point(116.395, 39.910);
    var pt2 = new BMap.Point(116.405, 39.920);
    var pt3 = new BMap.Point(116.410, 39.920);
    
    pts.push(pt1);
    pts.push(pt2);
    pts.push(pt3);
    var ply = new BMap.Polyline(pts);
    
    var pt = new BMap.Point(116.400, 39.915);    
    
    var result = BMapLib.GeoUtils.isPointOnPolyline(pt, ply);
    if(result == true){
        alert("点在折线上");
    } else {
        alert("点在折线外")
    }
    
    map.clearOverlays();
    var mkr = new BMap.Marker(pt);    
    map.addOverlay(mkr);    
    map.addOverlay(ply);   
}

//点在折线外
function ptOutPolyline(){
    var pts = [];
    var pt1 = new BMap.Point(116.395, 39.910);
    var pt2 = new BMap.Point(116.405, 39.920);
    var pt3 = new BMap.Point(116.410, 39.920);
    
    pts.push(pt1);
    pts.push(pt2);
    pts.push(pt3);
    var ply = new BMap.Polyline(pts);
    
    var pt = new BMap.Point(116.401, 39.915);    
    
    var result = BMapLib.GeoUtils.isPointOnPolyline(pt, ply);
    if(result == true){
        alert("点在折线上");
    } else {
        alert("点在折线外")
    }
    
    map.clearOverlays();
    var mkr = new BMap.Marker(pt);    
    map.addOverlay(mkr);    
    map.addOverlay(ply);   
}

//点在多边形内
function ptInPolygon(){
    var pts = [];
    var pt1 = new BMap.Point(116.395, 39.910);
    var pt2 = new BMap.Point(116.394, 39.914);
    var pt3 = new BMap.Point(116.403, 39.920);
    var pt4 = new BMap.Point(116.402, 39.914);
    var pt5 = new BMap.Point(116.410, 39.913);    
    
    pts.push(pt1);
    pts.push(pt2);
    pts.push(pt3);
    pts.push(pt4);
    pts.push(pt5);  
    var ply = new BMap.Polygon(pts);
    
    var pt =new BMap.Point(116.400, 39.914);
    
    var result = BMapLib.GeoUtils.isPointInPolygon(pt, ply);
    if(result == true){
        alert("点在多边形内");
    } else {
        alert("点在多边形外")
    } 
    
    //演示：将面添加到地图上    
    map.clearOverlays();
    var mkr = new BMap.Marker(pt);
    map.addOverlay(mkr);
    map.addOverlay(ply);      
}

//点在多边形外
function ptOutPolygon(){
    var pts = [];
    var pt1 = new BMap.Point(116.395, 39.910);
    var pt2 = new BMap.Point(116.394, 39.914);
    var pt3 = new BMap.Point(116.396, 39.919);
    var pt4 = new BMap.Point(116.406, 39.920);
    var pt5 = new BMap.Point(116.410, 39.913);    
    
    pts.push(pt1);
    pts.push(pt2);
    pts.push(pt3);
    pts.push(pt4);
    pts.push(pt5);  
    var ply = new BMap.Polygon(pts);
    
    var pt =new BMap.Point(116.410, 39.915);
    
    var result = BMapLib.GeoUtils.isPointInPolygon(pt, ply);
    if(result == true){
        alert("点在多边形内");
    } else {
        alert("点在多边形外")
    } 
    
    //演示：将面添加到地图上    
    map.clearOverlays();
    var mkr = new BMap.Marker(pt);
    map.addOverlay(mkr);
    map.addOverlay(ply); 
}
</script>